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CVE-2026-6703— Responsive Blocks <= 2.2.1 - Missing Authorization to Authenticated (Contributor+) Arbitrary Modification via AJAX Actions

Quick assessment

Affected
cyberchimps Responsive Blocks – Page Builder for Blocks & Patterns
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Responsive Blocks – Page Builder for Blocks & Patterns 2.2.1及之前版本存在安全漏洞，该漏洞源于未正确验证用户操作授权，可能导致经过身份验证的攻击者修改全局插

CVSS 4.3 · Medium EPSS 0.37% · P29

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-6703

Vulnerability Information
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Vulnerability Title
Responsive Blocks <= 2.2.1 - Missing Authorization to Authenticated (Contributor+) Arbitrary Modification via AJAX Actions
Source: CVE Program / CVE List V5
Vulnerability Description
The Responsive Blocks – Page Builder for Blocks & Patterns plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 2.2.1. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to modify global site-wide plugin configuration options, including toggling custom CSS, disabling blocks, changing layout defaults such as content width, container padding, and container gap, and altering auto-block-recovery behavior.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Responsive Blocks – Page Builder for Blocks & Patterns 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Responsive Blocks – Page Builder for Blocks & Patterns 2.2.1及之前版本存在安全漏洞，该漏洞源于未正确验证用户操作授权，可能导致经过身份验证的攻击者修改全局插
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
cyberchimps Responsive Blocks – Page Builder for Blocks & Patterns 2.0.9 ~ 2.2.1 -

II. Public POCs for CVE-2026-6703

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III. Intelligence Information for CVE-2026-6703

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IV. Related Vulnerabilities

Same product: Responsive Blocks – Page Builder for Blocks & Patterns
Same vendor: cyberchimps
Same weakness: CWE-862

V. Comments for CVE-2026-6703

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